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Title: Partial oxidation of methane over Rh/supported-ceria catalysts: Effect of catalyst reducibility and redox cycles

Abstract

Partial oxidation of methane (POM) was studied over Rh/(Ce0.56Zr0.44)O2 x, Rh/(Ce0.91Gd0.09)O2 x, Rh/(Ce0.71Gd0.29)O2 x and Rh/(Ce0.88La0.12)O2 x. The effect of catalyst reducibility and redox cycles was investigated. It was found that the type of doped-ceria support and its reducibility played an important role in catalyst activity. It was also observed that redox cycles had a positive influence on H2 production, which was enhanced as the number of redox cycle increased. Results of carbon formation are discussed as a function of ionic conductivity. Temperature programmed reduction (TPR) profiles, BET surface area, ionic conductivity and XRD patterns were determined to characterize catalysts. Catalytic tests revealed that of the materials tested, Rh/(Ce0.56Zr0.44)O2 x was the most active material for the production of syngas, which correlates with its TPR profile. It was observed that doping CeO2 with Zr, rather than with La or Gd caused an enhanced reducibility of Rh/supported-ceria catalysts.

Authors:
; ;
Publication Date:
Research Org.:
National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR
Sponsoring Org.:
USDOE - Office of Fossil Energy (FE)
OSTI Identifier:
935012
Report Number(s):
DOE/NETL-IR-2008-230; NETL-TPR-1996
Journal ID: ISSN 0360-3199; TRN: US200815%%91
DOE Contract Number:  
None cited
Resource Type:
Journal Article
Journal Name:
International Journal of Hydrogen Energy
Additional Journal Information:
Journal Volume: 33; Journal Issue: 11; Journal ID: ISSN 0360-3199
Publisher:
Published by Elsevier Ltd. on behalf of International Association for Hydrogen Energy
Country of Publication:
United States
Language:
English
Subject:
03 NATURAL GAS; CARBON; CATALYSTS; IONIC CONDUCTIVITY; METHANE; OXIDATION; PRODUCTION; SURFACE AREA; X-RAY DIFFRACTION; CHEMISORPTION; PENTACENE; SILICON; SORPTIVE PROPERTIES; MORPHOLOGY; ADSORPTION HEAT; Ceria; Rhodium; Partial oxidation of methane; Reducibility; Redox cycles

Citation Formats

Salazar-Villalpando, M D, Berry, D A, and Gardner, T H. Partial oxidation of methane over Rh/supported-ceria catalysts: Effect of catalyst reducibility and redox cycles. United States: N. p., 2008. Web. doi:10.1016/j.ijhydene.2008.03.016.
Salazar-Villalpando, M D, Berry, D A, & Gardner, T H. Partial oxidation of methane over Rh/supported-ceria catalysts: Effect of catalyst reducibility and redox cycles. United States. doi:10.1016/j.ijhydene.2008.03.016.
Salazar-Villalpando, M D, Berry, D A, and Gardner, T H. Sun . "Partial oxidation of methane over Rh/supported-ceria catalysts: Effect of catalyst reducibility and redox cycles". United States. doi:10.1016/j.ijhydene.2008.03.016.
@article{osti_935012,
title = {Partial oxidation of methane over Rh/supported-ceria catalysts: Effect of catalyst reducibility and redox cycles},
author = {Salazar-Villalpando, M D and Berry, D A and Gardner, T H},
abstractNote = {Partial oxidation of methane (POM) was studied over Rh/(Ce0.56Zr0.44)O2 x, Rh/(Ce0.91Gd0.09)O2 x, Rh/(Ce0.71Gd0.29)O2 x and Rh/(Ce0.88La0.12)O2 x. The effect of catalyst reducibility and redox cycles was investigated. It was found that the type of doped-ceria support and its reducibility played an important role in catalyst activity. It was also observed that redox cycles had a positive influence on H2 production, which was enhanced as the number of redox cycle increased. Results of carbon formation are discussed as a function of ionic conductivity. Temperature programmed reduction (TPR) profiles, BET surface area, ionic conductivity and XRD patterns were determined to characterize catalysts. Catalytic tests revealed that of the materials tested, Rh/(Ce0.56Zr0.44)O2 x was the most active material for the production of syngas, which correlates with its TPR profile. It was observed that doping CeO2 with Zr, rather than with La or Gd caused an enhanced reducibility of Rh/supported-ceria catalysts.},
doi = {10.1016/j.ijhydene.2008.03.016},
journal = {International Journal of Hydrogen Energy},
issn = {0360-3199},
number = 11,
volume = 33,
place = {United States},
year = {2008},
month = {6}
}